Eccentric cam drive



y 24, 1932- w. F. NEWHOUSE ECCENTRIC CAM DRIVE Filed Sept. 15, 1930 2 Sheets-Sheet May 24, 1932. v w, NEWHOUSE 1,859,457 7 ECCENTRIC CAM DRIVE Filed Sept. 15, 1930 2 Sheets-Shget 2 Q f #2 92 I.

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Patented May 24, 1 932 g i r v I umaeo ST T-Es PATENT 1 OFFICE WALTER F. NFWiE-IOUSEgOF HARBOR, MICHIGAN" I i U i I ECGENTRIC can DRIVE 1 i i i .Application filed September '15, 1936. Serial N0. 48 1,9 i6. I y y This invention relates to eccentric cams bushing 7is provided on the stud or pinj5, the i for actuating staplers or. other devices. inner endof this bushing being flanged at 8' Generally stated, the object of the inven-' as shown, and being flush with'th'e innerside tion isto provide a novel and improved conof the block 6 and the inner end of the stud struction whereby a curved and non-rotary or pin 5 as shown. With this arrangementf block .is employed for engaging the groove the rotation of the shaft 3 and the cam? will of' the eccentric cam, whereby to insuregreatcause the block 6 to travel relatively in'the er'smoothness, and less wear and looseness, groove or channel 2, and as the cam'l is ecinthe operation'of an eccentric cam actuatcentric to the shaft 3, it follows that the 10 in means of .this general character. block 6 and the members: will be causedto' It is also an object to provide certain details move up and down or reciprocate. As the and features of construction .and combinablock 6 has ample curved surface engaging tions tending to increase the general efficiency the walls of the channelor grooveQ, forming and the desirability of an eccentric cam driva substantially tight or accurate 'fit, it Yfoling or actuating means of this particular conlows that the impacts caused by the. actuatr m-i0 1, g L tion of the, member 4 up and down, as in driv- I To theforegoing and other useful ends, the ing staples, will not cause undue wear ordisinvention consists in matters hereinafter set tortion of the walls of the groove orcha'nnel forth and claimed and shown in'the accom- 2, as wouldbe likely'to occur if the block 'fi 320 an in drawin s in whichwas of c lindricalor roller form a s i's com p y a: g a y a 70 Fig. 1 is a side elevation showing one side mon,'-instead of being curved to conform to of an eccentric cam driving or actuating the curvature of the cam groove. In this way means embodying the principles of the inthe'a'ctu'ation of "the-mechanis mds smooth vention. and with'less wearyand with less loosenes's Fig. 2 is a similar view showing the other betweenthe cam and the engaging member, 7 I

side of said eccentric cam device. or the member which engages the cam groove,- Fig. 3 is a vertical section on line 38 in and there is less wear on. the's'jtud or'pin5.

'Fig. 1 ofthe drawings. with the arrangement shown and'described, Fig. 4L is a view similar to Fig.2, on a than would be the. case with an ordinary'rd.

I larger scale, showinganother form of the tating roller." The bushingf7 can berenewed,

invention. from time to time, if necessary, 'to takefup Fig. 5 -is a vertical section on line 55 in wear, and the block .6'can also "be renewed Fig. 4 of the drawings. when worn, although the block "is of such As thus illustrated, the invention, comform that it tends ;to reduce wear thereon to prises a-rotary eccentric cam.1-l1aving a;cira minimum. 1 Y

cular or annular groove '2, the I cam being The block6 tilts'backand forth, relative; keyed-to an operating shaft 23in any suitable ly to the member 14,duringtheoperation of or desired manner. the'mechanism, but does not-rotate about its An upright or vertical reciprocating memaxis, simply havingan-oscillating'jmotion on i her 4 may be connected with any device or the supporting pin '5.previously mentionedfigo mechanism to be operated by the eccentric In effect, therefore, the block 6 is 'a' segment cam. For example, the member 4 may be of an annular .eccentric strip or ringpbut connected to any ordinary or suitablestasaid block hasno oscillationrelativelyito the pling mechanism, for operating the same, by cam, as it fits'the cam groove. Itcould be the vertical reciprocation of said member. 'a full ring, "but this isnt'necessary -with'the95 i The upper end of this member 4: has an intecam having the annular cam groove or'changral stud or horizontal pin 5 on its inner side, nel 2, and hence the block 6 may :be only a and a wearing block or shoe 6 is mounted on fsegment of a ring and still have sufficient r this stud or pin, said block being curved to wearing surface to co-operate fwithfthe'ro V fit the groove 2 previously mentioned. A tar-y cam in the desired manner. Therpa r-ts are easily separated, and the construction is a firm and strong and rigid fastening de vice for securing the-cam on the shaft. By loosening the bolt or screw 10, the cam can be'removed from the shaft.

In Figs. 4 and 5 of the drawings, the construction is similar to that previously described, but in this case the cam 12 is pro- 7 vided with a plurality of concentric cam grooves 13, and the shoe or block 1% is pro-. vided with a plurality of segments 15 for a or shoehas more wearing surface, and greater contact with the cam, than when only one,

engaging said grooves, whereby the block 7 cam groove is employed as shown in Figs. 1,

' her 4 previously mentioned.

2, and?) of the drawings.

Furthermore, as shown in Fig. 5, the stud 16 is integral with the block or shoe 14, in p means for mountlng the block on said memstead of being integral with the link or member 17, which latter is similar to the mem- In Fig. 3, the bushing stud 5 and holds the block'6 in place.

7 is tight on the In 7 Fig. 5, a similar flanged bushing is rigid with .:the stud 16 and holds the member 17 against the cam.

curves whichareexactly thesame as the curves of the side walls of thecan1 grooves or channels. Thus, the block,'1n each case,

:iscurved to exactly fit the curvature of the cam groove or channel, with the resultthat the block cannot'oscillate or have a skewing motion relatively to the cam'groove or channel. In other words, the curved sides: or faces of the block are'parallel, and these parallel curved sides or faces are always parallel with the curved side walls of the cam groove or channel. Wherever the block is found in the cam groove or channel, its parallel curved sides or faces are exactly parallel with the curved side walls of the cam groove or channel. Hence, theonly oscillation of the block tively from one point to another in the groove or channel, but it never turns crosswise of the groove. or channel, not even to the slightest degree.

What I claim as my invention is:

1. An eccentric drive mechanism comprising a member to be reciprocated, a rotary cam havlng an v eccentric cam groove or channel,

the curved sides of said groove being formed on parallel curves, a curved block having parallel'curved faces fittingboth of the curved walls of said cam groove or channel, and means to pivotally mount said block on said member, whereby rotation of said cam is operative to cause reciprocation'of said memher, with incidental oscillation of said block on its mounting, while preventing oscillation or skewing of said block relatively to the ,cam

groove, the two sides of theblockbeing curved about the same axis. r Y

2. A structure as specified in claim 1, said block being in effect a segment of a ring that would fit said groove or channel, and said block being held by the cam against complete rotation on its mounting. f 3. A structure as specified in claim 1, said her comprising a stud integral withsaid memberp i 41. A structure as specified in claim 1, said means for mounting the block on said member comprising a stud integral with said member, together with a bushing interposed .be-

tween said stud and said block.

5. A structure as specified in claim 1, said cam having another cam groove concentric to said first mentioned cam groove,1said block having means fitting and engaging the last mentioned cam'groove. Q

,6. A structure as specified in claim 1, said cam having a plurality'of concentric cam.

grooves, of which 'said first mentionedcam groove is one, and said block having curved segments formingthemeans for fitting and engaging said grooves, whereby said block is held in positionn' concentric to said grooves.

7. A structure as specified in claim" 1, said 1 means for mounting theblock on said member comprismg a stud integral wlth Tone of said 7 elements. p 1 7 Specification signed this eleventh day of Sept, 1980.

- WALTER r. nwHous'nj isrelatively to the vertically reciprocating member 4 upon which it is pivoted or swivelled in'the manner shown and described.

its position. relative to the channel cannot change, but must always remain parallel therewith. Of course, the block travels rela-- A 

